Metallic belt.



No. 725,686. PATENTED APR. 21, 190s. W. .1. LGAN.

METALLIC BELT.

APPLICATION FILED JULY '1. 1902.

N0 MODEL.

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IVILLIAM J. EGAN, MILWAUKEE, WISCONSIN, vASSIGrNOR TO EDMUND BURKE, OF MILWAUKEE, WISCONSIN.

Nl ETALLIC BELT.

SPECIFICATION forming part Cf Letters Patent AN 0. 725,68 6,

dated April 21, 1903.

Application led .Tuly 7,1902. Serial No. 114,553. (Model.)

rubber or leather coverings; but so far as I` am aware no metallic belt has yet been con-y structed with a View to securing a frictional contacting surface of the metal of the belt upon the pulleys sufficient to permit of its practical use independently of an auxiliary covering, such as rubber or leather.

Metalic belts, even when used in connec-j tion with non-metallic coverings, have also failed to go into general use, owing to their tendency to creep, twist or warp, and crystal-y lize, a slight fiection of the metal in passing around a pulley being sufficient to crystallize and break the strands with a short period of use, especially where the pulleys are smally and the draft heavy.

The object of this invention is to provide a form of metallic belt which will have su-.

cient frictional contact to enable it to be used independently and which will not creep,warp, or crystallize in use. j

In the following description reference is had to the accompanying drawings,in which- Figure l is an edge View of a portion of a belt embodying my invention, showing-the same as used in combination with a rubber or leather belt of ordinary form. Fig. 2 is a plan view of the same. Fig. 3 is an edge View of my metallic belt as used independently, and Fig. 4 is a plan View of the same.

Like parts are identilied by the same reference characters throughout the several views. The metallic portion of my improved belt consists of a series of iiattened coils, each v formed of awireor bar. Each coil forms a transverse series of links l. The links of one coil project between those of the adjacent coil on each side, and the coils are secured together by means of pins 2, which are provided with end heads 3 to prevent them from slipping out.

Each link has a substantially iiat exterior bearingsurface,whereby the pulley-contacting surface is made substantially equal in dimensions to the length of the link and also to its width-t'. e., the diameter of the bar. The link preferably has also a flat surface for contact with the pin, the bars of which the coils are formed being preferably square or rectangular in cross section, as shown. Each link (except those at the end of. the coil) is in side contact with two links of each of the adjacent coils. The successive coils are oppositely Woundthat is, the links forming rone of the coils have a pitch or trend to the right, While those forming the adjacent coils have a pitch to the left. That portion .of the link which loops around the pin extends substantially in a longitudinal line of the'belt, the pitch or diagonal trend of thelink being intermediate of the pins 2, as clearly shown in Figs. 2 and 4. By having the coils oppositely Wound, as above stated, the belt is caused to draw in a true longitudinaldirection. Hence it will not creep or Warp.

It will be'observed, Figs. l and'3, that thel loop formed by the links is of sufcient size to permit the heads 3 of the pins to pass through when the coils are shoved together; but as soon as they are drawn out longitudinally the links of one of the coils `will draw inwardly against one side of the pin 2, while those of the vother coil will drawV inwardly against the' other side ofthe pin, thus narrowing the space through whichthe pin is passed and preventing the heads from slippingthrough the links. The beltA is preferably used on pulleys having non-metallic contact-surfaces. Y

Where it is desired to use the metallic belt in combination with leather or rubber belting,it may be secured thereto by means of staples 6, straddling the coils of some of the links and extending throughV the leather or rubber auxiliary belt' '7, the ends of the staples being clenched, as illustrated. Where the belt does not require to be shifted, it is not necessary to secure the metallic and nonmetallic portions together.

Having thus described my invention, what I' claim as new, and desire to secure by Letters Patent, is-

IOO

1. A series of integrally-connected beltlinks, comprising a flattened metallic coil, and having each link flattened transversely on the side of pulley contact.

2. Abelt comprising a series of connected flattened metallic coils, each coil constituting a series of links, and each link having a transversely-flattened pulley-contacting surface substantially equal in area to the length and thickness of the link.

3. The combination of a series of metallic coils, each formed of a coiled metallic bar, rectangular in cross-section, and constituting a series of integrally-connected links; said coils being arranged with links of each, interacting in side contact with two links of 'each adjacent coil, and a series of connectingpins extending through the interacting portions of the links.

4:. The combination of a series of flattened metallic coils, each constituting a series of links projecting between links of adjacent coils; and connecting-pins extending through the interacting portions of the links, each coil being wound in a direction opposite that of the coils to which it is directly connected in lineal sequence by said pins, and having a lateral pitch in a direction opposite that of the coils to which it is so connected.

5. In a belt, the combination of a series of iiattened metallic coils, each constituting a series of links projecting between the links of the adjacent coils; and connecting-pins extending through the interacting portions of the links, the progressive pitch of each link being between the pins, and the end portions of the linkseXtending parallel with the line of the belt, in side contact with the links with which they interact.

6. In a belt, the combination of a series of metallic coils, constituting a series of links projecting between the links of the adjacent coils; and connecting-pins extending through the interacting portions of the links, the progressive pitch of each link being between the pins, and the end portions of the links extending parallel with the line of the belt, in side contact with the links with which they interact, each link being formed with a pulleycontacting surface of dimensions corresponding substantially with the length and thickness of the link.

7. The combination of a series of metallic coils,each coil comprising a series of flattened links projecting between the links of the adjacent coils; pins extending through the interacting portions of the links, and headed at each end to prevent them from slipping out, the heads of said pins being adapted to pass through any single link, but prevented from' slipping through such link by the opposing engagement of the interacting links on opposite sides of the pin.

8. The combination of a series of metallic coils, each constituting a series of links, said coils being arranged with links of each, interacting with the links of each adjacent coil, and a series of connecting-pins extending through theinteracting portions of the links,

each link being formed with a pulley-contacting surface substantially equal to its length and thickness.

In testimony whereof I aix my signature .in the presence of two witnesses.

WILLIAM J. EGAN. Witnesses:

C. L. RoEscH, LEVERETT C. WHEELER. 

